Plaster-board



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Speeie-eton of Letter? Patent. Patented E Willemien med October so, wie. Serle Hesls To all wil/om irl may concern:

Be it known that we7 THOMAS H. A. How LEY, end JOHN 5. Ecolier, both citizens o' the United Sietse, end residents, res'oect-ively, ol elle city of New York, borough oillllenlretn ten, in alie county end Siete ofNew York and' of the city of New York, borough or Brooklyn, in eine county of Kings and State of New York, lieve invented e new and mproved Plestenoerd, of which the follow/w inis e. full, clear., end erect description.

he object ot" elle invention is to provide e new and improved pleser boord errenged to lock or key the plaster in place thus preventing the plaster from oeeomin1 ecciden tel-ly detached, eren should the pissier boord. or the lester become moiseend sofi.

Anoti er object is io reinforce the plaster board end et the seme irne provide e simple means for nailing it so line sndding., joists or other support without danger of the nsii -View to sustain, heavy plaster, cornices, or v -heads pulling ilirongii die seerd in cese tlie letter becomes damp ond sofi.

Another olojec't is to render the plaster board exceedingly eizrong by ille use of the reinforcement und thev locking keys with e other ornaments end the like.

With these end other objects in view, the invention consisfso'f cert-em novel features of construction as hereinafter shown end described and specifically pointed out in the claims. v

A practical embodiment of the inventio is represented inl the accompanying drewings forming e part of this specification, in which similsr characters of reference indieste correspending"` peres in ell xhe views.

Figure l is e fragmentary fece View of 'the .improved plaster boerd; I

Fig. 2 is e sectional plan View of the seme on the line 2 2 of Fig. l;

Fig. 8 is e fece View of the improved plaster board as applied; and

Fig. 4 is e sectional plan View of the seme on the line' -fiof Fig. 3.

The body l0 oi the plaster boerdis formed in the usual manner of alternating layers mede of peper and e iiller, preferably 01"' e. cementiaious materiel. lin order to reinforce the body l() end to provide e means for securel festening'the plaster board to the stud ing oi?l e well or the joisi-s of e ceiling or to any other soitslile support l1 (see Fi 4) use is mede oi' metallic strips 12 am doeii in. eine loodje* during 'eine proeees premies, :gil/foir eroine ed in. sner- -d ofi x feet,

si: onrseives le will be noiced that by the errengeinene describedighe plaster. seerd een lie readily end seenrely fastened in position on elle support 1l by the use of nails 2.3 driven through eine plaster board and the strips 12* It will-be miieed,

ed perellel indie-ated, I

that the strips l2 reinforee the body i() endl et the seme time provide s simpie means' seerd ivo ish-.e

for securely nailing the pesi-er support wiisiiout danger of the neil. vheed pulling lrrough the board in cese the lett-er becomes damp or soft. i

In order to further reinforce the plesier boord and o provide e keying; nieens for holding the plaster le seeurelgvv in position on the outer face of the plaster looerd,` the following errengeme'nt is mede: The body l() is provided interreediee the stri and between the strips and the endso the board with punctures 20 arranged in spaced and staggered relationv preferably es indicated in Figs. l endg, end the punotnres 20 delirio locking tongues or ken with the body 10 sind norrnely lusll 'with the feces of the plaster board. Ii; will be s 2l integral;

noticed that by this arrangement, the pnetures 2O ere normally closed by .the tongues 2l but when' the plesier 14: in its elastic.

state is applied to the fece of the plaster board then the plaster exerts e rearward pressure against the tongues 21 and thus swings the seme rearward into en e. lar position relewe to the .rear `ieee o the body l0, as plainly indicated in Fig. 4f It will loe noticed that e portion of the pleister M passes through the keywey formed by the bending of the tongues 2i snol engages the reer face oit-he body 10 adjacent the pone ture 2O and also engages the sides and the free ends of the now strucleup tongues 21 as well es the rear margins thereof thereby securely kejylng the plaster inposition on ille plaster board. The plaster also fills the openings mede by the rearward bending of the tongues 2l, es shown in Fig. ai.

By he eomemed notion o1 the miniere# lille even should the plaster board or the plaster become moist or soft.

Having thus described our invention, we claim as new and desire to secure by Letters slits extending 1. A plaster board provided with slits in spaced relation and forming tongues, the through' the board and the tongues being normally flushwith the faces of the plaster board and lying Within the openings defined by the slits, the tongues moving int-o an angular position on the back oi the plaster'board on applying plaster to the face thereof, each of the said tongues Aon keyway Wall of of the corresponding angular tongue a locking means for the plaster passing through the opening onto the back of the plaster board and onto the edge of the tongue.

2. A plaster board, comprising a body having a plurality of superposer] layer. and a plurality of spaced nailing and reinlforcing strips embedded in the said body.

3. A plaster board, comprising a body' having a plurality of superposed layers and a plurality of soaced nailing and reinforcing strips embedded in the said body adjacent the front layer.

THOMAS H. A. HOWLEY. JOHN J. DOOLEY.

in the corresponding opening, the each opening forming with the edge 

